The piece that is 3/4" in this diagram http://go.rockler.com/tech/15455.pdf (between the face of the cabinet and the door) is only about 3/8" on my hinges. This would basically leave the doors "floating" another 3/8 off of the cabinet faces.

I even tried fabricating my own hinges tonight (by bending and cutting some old hinges), and it didn't turn out too well.